LeoShanna :
Oops didnt mean to select best answer...
I dont have the CPU already but the k version is actually cheaper on amazon atm.
I dont know if I plan on overclocking, not sure if its worth the effort for the performance gain
i wouldnt bother, just use the reference for now. it comes with it anyway. If you weant you can always upgrade the cooler if youre going to overclock.
Get the 980ti and upgrade that monitor, pronto.